Malicious PDF — malware analysis report

Static analysis result for SHA-256 e217d4c93ac5e569…

MALICIOUS

PDF

75.3 KB Created: 2021-03-08 20:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48d6e76d1ee5e4f4500de48e3fde621a SHA-1: 35397d9b22ad9f38d49e3ef8fad2eaa0a679a104 SHA-256: e217d4c93ac5e56986db12a80cff6d39ed4493c680c6a4195995bd441fb98298
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=why+did+twilight+victoria+change PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5ff84ddc7d639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491669/normal_5ffde6db522c4.pdfIn PDF document text
    • http://loberas.22web.org/avatar_2_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xujitezu/tulidebo.pdfIn PDF document text
    • http://pepiretivixu.epizy.com/spam_bot_discord_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaea244-8ed9-4fd7-9bce-66f251ab5fcb/38718699476.pdfIn PDF document text
    • http://putajamesar.rf.gd/2015_jeep_grand_cherokee_service_air_suspension.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_f90546624ff145f8a802ad55145469e7.pdf?index=trueIn PDF document text
    • http://solujenujaki.epizy.com/ca_disability_form_2500a.pdfIn PDF document text
    • http://gegenig.epizy.com/sing_sing_sing_clarinet_solo_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2474b48e-e905-4d3a-9b2d-4ae111137e19/ruvivefotimejawimedukuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbac097-4677-4b6b-82ee-bb8aa7d03dbf/dixinawajule.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/bowusefanemebosawezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75832a89-5ea5-4c6f-bbe9-a4136a151e46/fulaxo.pdfIn PDF document text
    • http://wovikoverule.epizy.com/the_writer_presence_9th_edition_table_of_contents.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_6900d363d4a346339b04090991638467.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_7fd050ac6c9140b490c699d4ff1d1400.pdf?index=trueIn PDF document text
    • http://jupuluna.epizy.com/87713813958.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_43fed65ddf554516bc1d08c99d721dc1.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_c4061a8217a3441aa65ec20d329e9548.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/goonersguide_betting_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/can_i_fortnite_on_my_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42832446-edb5-47a0-9de0-226f06639602/thank_you_mom_quotes_for_instagram.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 5292 bytes
SHA-256: fe22a98d12a99a0d21037724078bff8a1a1f2bbf8ce1cd551774693355b40be5
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 11516 bytes
SHA-256: 0b7a38576c2085890d211cd0e4a151ec4f15aa841c61f8b00bc9692cadb733d6